SlackwareThis Forum is for the discussion of Slackware Linux.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
I just installed Slackware 9.1. First order of business was to get the firewall up so that I could get online. I found a ruleset written by someone named Arno at simplylinux dot punted dot net. (It's my first post. Evidently I'm not allowed to use URLs until the fifth post. Anywho...) Apparently, it's reasonably widely used.
It looks pretty comprehensive, although I haven't had the chance to go over the rules in detail, but I did notice one problem that I thought should be pointed out. The first rule in the INPUT chain is supposed to accept all packets originating from the loopback interface. It comes from the following line in the rc.iptables script:
$IPTABLES -A INPUT -i lo -j ACCEPT
However, apparently my system didn't recognize "lo" (I'm guessing), and the first rule in my INPUT chain ended up accepting all packets from all sources regardless of protocol. Not much of a firewall, that. Once I changed the rule to read